Long time while generating

[AboZeid]

Hi,
I've a ".fet" file, it takes more than 2 hours with no results. i.e, still processing without stop
Is there a problem?
Note: I couldn't attach fet file due to its large size, so I put it on this site:
http://www.mediafire.com/?kwo77xbcy3y8tvw
http://www.4shared.com/file/IqftVC_e/data.html

Thanks

[Liviu Lalescu]

Probably activity with id 723 is impossible considering previous activities in the initial order.

PS: You can archive the input file and post it here.